Red Hot Chili Peppers lead singer Anthony Kiedis performs as they headline on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Fans react as the Red Hot Chili Peppers headline on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Red Hot Chili Peppers bassist Michael "Flea" Balzary performs as they headline on the Land's End stage at the Polo Field during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Fans react during the Red Hot Chili Peppers set as they headline on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. Country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Red Hot Chili Peppers bassist Michael "Flea" Balzary, left, and guitarist Josh Klinghoffer, right perform as they headline on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Fans react as the Red Hot Chili Peppers headline on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Red Hot Chili Peppers bassist Michael "Flea" Balzary catches air as they headline on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Fans react as the Red Hot Chili Peppers headline on the Land's End stage during the Outside Lands Music and Arts Festival atGolden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Red Hot Chili Peppers lead singer Anthony Kiedis performs as they headline on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Jane Nicholson, right, and Tom Cannone, of Norfolk, Va., wear mohawks of light during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Red Hot Chili Peppers drummer Chad Smith performs with lead singer Anthony Kiedis, right, as they headline on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Country legend Willie Nelson performs with his son Lukas, right, on the Sutro stage in Golden Gate Park during the Outside Lands Music and Arts Festival in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Country legend Willie Nelson performs on the Sutro stage in Golden Gate Park during the Outside Lands Music and Arts Festival in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Country legend Willie Nelson performs on the Sutro stage in Golden Gate Park during the Outside Lands Music and Arts Festival in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Country legend Willie Nelson performs on the Sutro stage in Golden Gate Park during the Outside Lands Music and Arts Festival in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Country legend Willie Nelson performs on the Sutro stage in Golden Gate Park during the Outside Lands Music and Arts Festival in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Country legend Willie Nelson greets the crowd as he takes the Sutro stage in Golden Gate Park during the Outside Lands Music and Arts Festival in San Francisco Calif., on Sunday, Aug. 11, 2013.(Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Vampire Weekend lead singer Ezra Koenig performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. To the right is bassist Chris Baio. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Festivalgoers come and go during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Vampire Weekend lead singer Ezra Koenig performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Dumpstaphunk guitarists Tony Hall, right, and Ian Neville perform on the Land's End stage at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

A festivalgoer chills out during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Dumpstaphunk keyboardist Ivan Neville performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Dumpstaphunk guitarist Tony Hall performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Dumpstaphunk drummer/vocalist Nikki Glaspie performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Foals lead singer/guitarist Yannis Philippakis performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Foals lead singer/guitarist Yannis Philippakis performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Fans react as the Foals perform on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Foals guitarist Jimmy Smith performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Foals bassist Walter Gervers performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Fans react as the Foals perform on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Foals drummer Jack Bevan performs on the Land's End stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Trombone Shorty performs on the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Trombone Shorty, right, and guitarist Pete Murano left, perform on the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Trombone Shorty, right, and guitarist Pete Murano left, perform on the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Trombone Shorty performs on the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Trombone Shorty performs on the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Trombone Shorty performs on the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Trombone Shorty performs on the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

The Samba Stilt Circus performs near the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Cindy Clark, of the Samba Stilt Circus, center, performs near the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

The Samba Stilt Circus performs near the Sutro stage during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Amy Higgins, of Los Angeles, attends the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Festivalgoers are seen during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Juliann Zosa and Scott Sirus, of San Francisco, take part in the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Aaron Solomon, left, and Chip Franklin, of Boston, dance during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

Kat Furman, left, and Courtney Lodin, of Los Angeles, dance during the Hall and Oates set out the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )

A festivalgoer sleeps during the Outside Lands Music and Arts Festival at Golden Gate Park in San Francisco Calif., on Sunday, Aug. 11, 2013. The three-day festival concluded on Sunday as the Red Hot Chili Peppers headlined on the Land's End stage and country legend Willie Nelson headlined on the Sutro stage. (Jane Tyska/Bay Area News Group) ( OUTSIDE LANDS )